Sala, an artist in Zürich, Switzerland is selling 1000 paintings of. . .the numbers 1 through 1000. But you should move fast if you are interested. There is an interesting formula involved that makes the paintings more expensive as fewer become available:

Value = 1000 - number
Initial discount: 90%
Current discount: 80%
The discount will decrease by an absolute 10% for every 100 paintings sold.
Min. price: $40.

So for example, the painting of “755″ is now $49, but after 900 paintings are sold, it will cost you $245. Link

1000 Numbers